FEATURE: Display the reason for many reviewable items

Queued Posts and Users will now display a reason why they are in the
review queue.

spec/jobs/create_user_reviewable_spec.rb

@@ -6,14 +6,40 @@ describe Jobs::CreateUserReviewable do
   let(:user) { Fabricate(:user) }
 
   it "creates the reviewable" do
+    SiteSetting.must_approve_users = true
     described_class.new.execute(user_id: user.id)
 
     reviewable = Reviewable.find_by(target: user)
     expect(reviewable).to be_present
     expect(reviewable.pending?).to eq(true)
-    expect(reviewable.reviewable_scores).to be_present
     expect(reviewable.payload['username']).to eq(user.username)
     expect(reviewable.payload['name']).to eq(user.name)
     expect(reviewable.payload['email']).to eq(user.email)
   end
+
+  describe "reasons" do
+    it "does nothing if there's no reason" do
+      described_class.new.execute(user_id: user.id)
+      expect(Reviewable.find_by(target: user)).to be_blank
+    end
+
+    it "adds must_approve_users if enabled" do
+      SiteSetting.must_approve_users = true
+      described_class.new.execute(user_id: user.id)
+      reviewable = Reviewable.find_by(target: user)
+      score = reviewable.reviewable_scores.first
+      expect(score).to be_present
+      expect(score.reason).to eq('must_approve_users')
+    end
+
+    it "adds invite_only if enabled" do
+      SiteSetting.invite_only = true
+      described_class.new.execute(user_id: user.id)
+      reviewable = Reviewable.find_by(target: user)
+      score = reviewable.reviewable_scores.first
+      expect(score).to be_present
+      expect(score.reason).to eq('invite_only')
+    end
+  end
+
 end